[Ed Hubbard]

Well, bought some POR today locally ($31 a quart!) and came home tonight to try it out.

This weekend I washed my frame with strong soap & water. After it dried I sandblasted it & then sat it in the garage yesterday.

Tonight I try some POR - bubbles or fish-eyes everywhere.

Try wiping the frame down with mineral spirits. Bubbles/fish-eyes.

Try paint thinner. Bubble/fish-eyes.

Try brake clean (always works for normal paint). Bubbles/fish-eyes.

Try pure alcohol. Bubbles/fish-eyes.

Shake up the can of rustoleum expoxy appliance paint (I really like this stuff, shiny & hard). Perfect.

I guess you *must* use their etching product or just paint over really rough rust, because I couldn't get it to work at all for me. I managed to get it all off with carb cleaner & disk brake clean.

I'm headed to the powder coaters. Live & learn.

 

[Sergio]

yep,
You needed to have cleaned the frame according to their instructions:
Step by Step Instructions

I used POR-15 on my frame following their recommendations and have no complains.

 

[Ed Hubbard]

Believe me, I'm frustrated with this as I've read good stuff here about POR. And while I'm sure its me just being dumb, I have managed to fit my 4.6 DOHC into the car which required a bunch of modifications so I'm not a total idiot (my wife might argue w/me on this point!).

And I did read the step by step instructions. Step one is clean the rusty metal surface - I didn't have a rusty metal surface, I had a freshly sand blasted surface & the stuff wouldn't apply smooth at all. What step one should say (if this is correct) is: buy our cleaning and prep products no matter what the surface looks like because it isn't going to apply well otherwise.

My .02.

[ August 20, 2002, 01:45 AM: Message edited by: Ed Hubbard ]

 

[Brendan]

Maybe I'm guessing here, because I haven't used either yet, but aren't you supposed to wash / etch the surface after the sandblasting to make sure that you remove all the residue? Ed, did you do both before and after?

Regardless, this is a step that I'm interested in, because I'll be prepping / painting my frame somewhere around a month from now. Hard, Black, Shiny surface. I've been considering spraying POR-15 with my HVLP gun (I know of safety issues from an earlier thread) but anything in a spray can sounds really really easy.

Brendan

 

[n559br]

I used the POR-15 on my bare metal frame. I used the marine clean and metal ready products and it worked like a champ. In fact you can even roll it on with those 4" epoxy rollers. Gives a very nice finish and very fast.

Ben

 

[Ozona]

You didn't shake up the can did you?

I didn't get any bubbles.

I did:

Marine Clean (Wear Gloves)
Metal Ready
POR - 15 with paint brushes (Takes a while)

If you're gonna spray the stuff, go get a cheap-o sprayer from harbor freight and chuck it when you're done. I think they can be had for $16.00

I know everyone talked it to death, but be aware that the stuff has isocyanates in it and "catridge" style breathers won't filter it sufficiently for OSHA. (Just my disclaimer.)

Ozona

One last comment, the POR15 "flows" as it dries, my frame currently looks like grey powdercoat - that was BRUSHED on. (No brushmarks tho)

[ August 20, 2002, 08:07 AM: Message edited by: Ozona ]

 

[Rigler]

I had the exact same problem. I sand blasted the frame. I used the marine clean and then the metal ready. No matter what I did I could not get it to stop bubbling. I STUPIDLY did the whole frame with the stuff because I wanted the rust protection. I also did my rearend using the same steps minus the sandblast and it turned out beautiful. I was doing something wrong and don't know what but it looked and continues to look very bad. Many hours of disappointment in that process.

Dave

 

[Ozona]

Hmm. Sounds like maybe the small pits the sandblaster leaves behind could be the culprit with the bubbles.

 

[Aaron Silidker]

A sandblasted surface is quite rough, but if it was layed on heavily enough, it should have been fine. I think the residue from the sand(it leavs alot of crap behind, I had problems with sandblasted surfaces and spray paint) may have been the cause. Try acetone maybe?

 

[vince ffr3209]

i sandblasted my rearend, used the metalprep, and painted the por15 with a brush, looks great , my only regret was using a brissel brush, alot of brissels in the paint, i cant even get them out, this stuff is that hard, shoulda used a sponge brush.vince

 

[DragonSnake]

Ed,

Could it be the humidity? What is the recommended temperature/humidity range for POR. I've been waiting to paint my frame with Hammerite because it's just too damn hot and humid. The can says it should be < 85% humidity and 75 degrees.

-Joe

 

[Phantom Cobra]

I got the same thing with my silver basecoat. I never could get the pigments completely mixed in with the carrier. The result was fisheyes and swirls.

The instructions say not to shake the can, so I stirred for 15 minutes, then applied to a small area. Seeing the lousy finish, I stirred another 10 minutes then tried another area. I guess it never mixed very well. Next time I will empty the paint into a larger can and really mix it well. I was hindered from aggressive striiing by the completly filled quart can.

Steven